An OSS permit is needed anytime you construct, repair, replace, modify, connect to, or expand your OSS. An OSS is not required if you replace a baffle in a septic tank, fix a broken house sewer pipe, replace a pump control float, fix or replace risers, lids, or inspections ports, or replace a pump. On-Site Sewage

State and county sewage control regulations require that either a licensed OSS designer or Registered Professional Engineer design your OSS. The state issues Licenses for Designers and Engineers. Washington State Department of Licensing

Whatcom County code requires that all OSS be installed by a licensed OSS installer; however, if you are the property owner and you will live in the home the OSS will serve, you can request an exemption from certification requirements. The request will be reviewed and if approved, you can install the OSS. We recommend that you hire a Licensed OSS Installer for complex systems, e.g. pressure systems or alternative systems.

Some warning signs of a failure are odors, surfacing sewage, soggy spots with lush green grass growth in the drain field or septic tank area, plumbing or septic tank backups, slow draining fixtures, or gurgling sounds in the plumbing system. If you suspect that your OSS is failing, contact us for assistance. Health Department

If you have an as-built tank, locating the septic tank will be easy. If 1 is not available you or your pumper will need to use some investigative skills. If a crawl space is available you may determine where the plumbing leaves the foundation wall and then use a probe bar to find the tank. Use caution as fiberglass or polyethylene tanks can be ruptured with a probe bar. Probing works best if the tank is not more than 1-2 feet under the surface.

If a crawl space is not available, you can sometimes use the plumbing vents located in the roof. A plumbing vent may align with the exit point of the sewer line leading to the septic tank. If these options don't work it may be necessary to use an electronic detection device with a transmitter that can be flushed down the toilet.

The reserve area is designated on your OSS Permit and is another area approved for the installation of a new drain field in case the main drain field fails. The reserve are must be kept clear of impermeable surfaces, e.g. buildings and pavement. If your OSS permit was issued more than 5 years ago, you may need to have your reserve area redesigned to meet current code requirements.